Improvement in processes of purifying middlings



- Toalt whom itmayoonaerm Beitknown that we, WILLIAM W. HUNILEY UNITED STATES? PATENT l OFFICE.

WILLIAM/W HUNTLEY AND ABEL P. Ho Lc oMB, or si'nvnn OREEIQN. Y.

. [MPROVEMENT PROCESSES OF PURIFYING MIDDLINGSL Specification forming part of Letters Patent No. 135,811, dated February 11,1873.

and ABEL PJIHOLGOMTB, of Silver Creek, in

i a the county of Chautauqua and Stateof New York, have'invented'anlmprovedProcess for" Purifying Middlings, of whichthe following is-a specification: p

In treating that portion of the products of ground grain termed .middlings," according to our, newly-discovered process, ;we pass them into-a machine which is provided with a disintegrator or whippers, so arranged that as the middlings enter it. they shall bebrought in contact'vwithrapidly-moving whippers or heaters for the purpose of causingthem to whip or beat ljoosefrom the valuable parts of said middlings any smut,'dirt, or other forreign substance whichj mayadhere thereto,

and which would be injurious to the flour if allowed to remainin contact therewith while such Valuable parts are being reground.

While the above-named result is being ac complished a current of air is inducedto flow through the" chamber or space occupied by thewhi'ppers, it being caused by-a suction or Q blast fan, and 'bein g of suflicient force to take away and carry-to any properreceptaclc'or totheatmospherethe sm t, dust, or other substances detached by said whippers, but not ofsufficient force to carry away any of the valuable parts of the material,-such parts falling of their own gravity into some suitable receptacle, fromwhi'ch they are conducted to I a suitable boltingor sifting device for the purpose of being separated intosuch parts as are to be re'ground, suchasare alreadyso line as not to requireregrinding, and such as are not of sufiicient value to justify regrinding. After this separation has been made the coarser and most valuable parts of the material are returned to the eye of the stone and reground, either separately or in connection with unground grain, as may prove most desirable. The first stage in our process is of great importance, as in grinding wheat the smut,

moreor less of which always adheres to the kernel when it passes between the stones, also adheres-withwgreat tenacity to the particles into which the kernels are broken when grinding, and consequently can only be detached therefrom by the act 'of-"whipping or beating it loose from such particles; and as it is a 'fact that the coarser particles of the middlin gs contain' the most nutritious portion of the kernel it is important that such separation be thorough, in order that when the valuable parts are reground a white clean flour may be the result, as well as flour which isrich in gluten. a 1

A very importantad vantage of this process of purifying middlin gs results from 1 having the smut removed and carried away previous to the deposition of the middl'ings upon the sieves, so that the smut cannot now' gum up the meshes of the sieves as it doesin processes heretofore employed. WVe have deemed'it unnecessary to describe in this patent'a machine for carrying'out our process, as such a machine is described in detail in anotherpatent, granted to us; of, even date with this, to which we refer for an, explanation of the mechanical details.

.- \Ve claim as our invention a The mode of purifying middlin gs,-previous1y to their being separateddnto different grades by bolts or sieves for regrinding," by subjecting them to the action of whippers' or beaters while passing'through-a current of air,,sub-

stantially in the manner as set forth.

two subscribing witnesses; 7

WILLIAM w. HUNTLEY. ABEL r. HOLUOMB.

Witnesses Amos BOWEN, A. H. SPAULDING. 

